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In hydroelectric projects, few investigations have been carried out to determine the taxonomic composition of diptera of the family Psychodidae, subfamily Phlebotominae. In this work, a taxonomic inventory of phlebotomine sandflies was conducted in the area of influence of the Ituango hydroelectric power plant, in the department of Antioquia, Colombia. We highlight their medical importance as vectors of the protozoan of the genus Leishmania and update their distribution. Entomological monitoring was carried out in ten municipalities from the western subregion (Santa Fe de Antioquia, Peque, Olaya, Liborina and Sabanalarga) and the northern subregion (the municipalities of Ituango, Briceño, Valdivia, Toledo and San Andrés de Cuerquia). CDC traps and Shannon traps were used for monitoring. For taxonomic identification, the keys of Young and Duncan and Galati were used. A total of 7993 phlebotomine sandflies were collected, distributed in 39 species according to Galati, highlighting six species considered vectors of Leishmania spp. that causes cutaneous leishmaniasis, which are: Lutzomyia (Trl.) gomezi, Lu.(Hel.) hartmanni, Psychodopygus panamensis, Pintomyia (Pif.) columbiana, Nyssomyia trapidoi and Ny. yuilli yuilli.